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This paper introduces a lifecycle perspective on social robot design and human-robot interaction, and explores the practices of maintenance, repair, and letting go of social robots. Drawing on interviews with robot owners and representatives of robot development and repair companies, we argue that these previously disregarded aspects of everyday use provide a context for negotiating the social value and meaning of interactions with robots. We discuss owner concerns about robot obsolescence, as well as company support for long term human-robot interaction through repair, reuse, and giving owners closure in letting go of robots they can no longer use. Our work expands the purview of HRI study and design beyond the common focus on initial design and adoption and to perceptions and practices that can foster more enduring relationships with social robots, support sustainability in robot design, and address owners emotional attachment to robots.

IEEE RO-MAN 2024

The Lifecycle of Social Robots: Obsolescence and Values in Repair

emotional attachment

lifecycle

sustainability

RO-MAN 2021's theme is trustworthiness and cooperation. We chose this term well before the pandemic put the world on edge and added a new reason for us to question our own personal safety when in the company of others. But what about in the company of social robots? What would cause us to trust, or not trust, them? How do we as researchers create that feeling, that critical component of any relationship? With social robots, it is of course largely in our power to design the physical form, the control code and the interface software to maximize trustworthiness, facilitate cooperation and enhance the quality of human-robot interaction. This theme also touches upon people's expectations and perceptions of robots, as well as other social, cognitive and cultural factors that will influence human-robot interactions. We will have a special session/track on this topic, invite targeted submissions and include plenary speakers who are specialist in this area. We sincerely hope that this focus will help enlighten the design-thinking of all of us as we fabricate and program our own various systems.

To access RO-MAN Virtual 2021, [please register here.](https://ro-man2021.org/registration/)

IEEE RO-MAN 2021

RO-MAN 2021's theme is trustworthiness and cooperation. We chose this term well before the pandemic put the world on edge and added a new reason for us to question our own personal safety when in the company of others. But what about in the company of social robots? What would cause us to trust, or not trust, them? How do we as researchers create that feeling, that critical component of any relationship? With social robots, it is of course largely in our power to design the physical form, the control code and the interface software to maximize trustworthiness, facilitate cooperation and enhance the quality of human-robot interaction. 

technical paper

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Dear Colleagues and Friends,

The 33rd IEEE International Conference on Robot and Human Interactive Communication, IEEE RO-MAN 2024, was held at Pasadena Convention Center in Pasadena, USA.

The theme of the IEEE RO-MAN 2024 was **“Embracing Human-Centered HRI”**.

With the continuous technological effort of understanding human needs, creating human-desired robotic systems, and developing real human user experiences, we are marching together towards building a promising and excellent human quality of life, all for our wellness and our next generation.

The conference provided a forum for researchers and practitioners to discuss a variety of topics related to the broad theme of Robot and Human Interactive Communication involving theories, methodologies, technologies, empirical and experimental studies, and generated more insights for the future of Robot and Human Interactive Communication!

We hope you continue to enjoy the post-conference content on Underline!
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The 33rd IEEE International Conference on Robot and Human Interactive Communication was held in Pasadena, California, USA. The theme of the IEEE RO-MAN 2024 was “Embracing Human-Centered HRI”.

In this work, we introduce the adaptation of ego network analysis (ENA) as a methodology to investigate group- robot interactions (GRI) in public spaces. Based on a field study with 16 GRI, our research explores the complexities of group dynamics and offers a reflection on the use of ENA to assess these interactions. Our results contribute to a nuanced understanding of how group structures influence the perception of social robots in GRI. The insights on the use of ENA in human-robot interaction (HRI) lay the foundation for strengthening methodologies and advancing our understanding of social dynamics in HRI.

Connecting the Dots: Advancing the Understanding of Group-Robot Interactions in Public Spaces Through Ego Network Analysis

This paper presents a novel AI system architecture designed for critical infrastructure, emphasizing the importance of human-robot interaction (HRI) in improving the explainability of AI decision-making. The proposed approach combines Case-Based Reasoning (CBR) and ontology to create a dynamic AI framework that ensures transparency and trustworthiness in autonomous operations. In which the Case-Based Reasoning (CBR) component employs prototype and exemplar methods from cognitive psychology to mimic human decision-making, while the ontology component organizes the knowledge base, enhancing clarity and comprehension. The proposed system architecture consists of three interconnected components that work together to improve the AI's explainability and adaptability in dynamic environments. These components include: 1) a Case-Based Reasoning (CBR)-powered decision-making module that enables the AI to learn from past experiences and justify its actions in a human-understandable format; 2) an ontology-guided knowledge framework that provides a structured and semantic representation of information to guide AI operations; and 3) an HRI mechanism that facilitates effective collaboration between humans and the AI system, ensuring that autonomous decisions are transparent and aligned with human oversight.We evaluate the proposed architecture in a simulated environment, demonstrating improved AI explainability and reliability. Our findings show that the integration of CBR and ontology links decision-making with transparency, highlighting the role of HRI in accountable AI for critical infrastructure. The paper discusses the design and outcomes of the study, paving the way for the development of more transparent and trustworthy AI systems for critical infrastructure.

Building Intelligent and Intelligible AI: A Framework for Human-Like Autonomy and Explainability in Critical Infrastructure

This paper investigates the effects of gender neutralization on the perception of anthropomorphism, gender specificity, and novelty for human voices, comparing spoken and hummed voice modalities. We evaluated gender-neutralized and original voice samples in both spoken and hummed formats using an online survey. Our results confirm that gender-neutralizing filters effectively reduce perceived gender specificity in both modalities, supporting their use in creating gender-neutral voices for humanoid robots. Hummed voices were perceived as more anthropomorphic and less novel than spoken voices, suggesting that non-verbal sound modalities can enhance the human likeness of gender-neutral androids while maintaining gender ambiguity. The study contributes to HRI by highlighting the potential of humming to fulfill users' expectations of interaction with android robots.

Evaluating Gender Ambiguity, Novelty and Anthropomorphism in Humming and Talking Voices for Robots

Social robots are finding their way into our society and must adapt to the social norms of everyday life. It is often unavoidable for robotic assistants to interrupt humans in their activities. These interruptions must therefore be designed in such a way that they have as little negative impact as possible on the ongoing activity and the perception of the robot. In this study, we investigate whether interruptions regarding health-promoting behavior delivered by a social robot in an office situation should be phrased politely rather than directly. A system was implemented to trigger either politely or directly phrased interruptions in a laboratory user study with participants executing an office task. We examined the perception of the robot, the task, and the interruption, as well as whether the health-promoting behavior was performed by the users. The results show that there were no significant differences in the perception of the robot and the interruptions, while the temporal demand of the task was perceived to be higher in the polite condition. In addition, the intention to follow the polite prompts was significantly higher, but there was no difference in the actual compliance with the prompts in the study itself.

Excuse Me, May I Disturb You? the Influence of Politeness of a Social Robot on the Perception of Interruptions

This paper presents the design of a novel social robot, namely Patbot, to engage people in playful interactions to help reduce their anxiety in waiting environments. We introduce the rationale and design decisions made during the development of the robot. We evaluated the robot's usability through an experiment within a simulated waiting environment, followed by interviews with the participants. The study indicated a positive effect of interacting with Patbot regarding STAI-6 anxiety measures. Other quantitative and qualitative measures, including Godspeed questionnaires, observation, and post-interviews, revealed positive impressions made by Patbot regarding its likability and animacy and that it could engage individuals in intuitive and playful activities. Our findings suggest the promise of designing social robots for entertainment and relaxation to enhance people's emotional experiences in waiting environments.

Patbot: Designing a Social Robot to Reduce Anxiety in Waiting Environments

We explore the potential of mobile motion as an expression modality for home social robots with a low expressivity. To gauge the potential of mobile motion, we examine its relative efficacy in terms of emotion perception accuracy, emotion intensity, and impression (anthropomorphism and animacy) compared to screen-based facial expressions. Additionally, we explore how users perceive the emotional intensity of expressions based on different degrees of expression by manipulating emotional features such as motion size and speed. Motion expressions are less accurate than facial expressions, but perform on par with facial expressions in other metrics. Its dynamic and expressive features elicit powerful emotional conveyance, in contrast to the low emotional impact associated with the monotonous nature of screen-based facial expressions. Further research is needed on ME for specific emotions, but in general, the higher the degree of expression, the more intense the emotion conveyed. We show that the degree of expression, i.e., the combination of emotional features and their modulation, can be utilized to express the emotional intensity, situational dependence, and personality of robots. In conclusion, we argue that mobile motion is a promising method to compensate for the weaknesses of screen-based facial expression, which is the dominant expression modality for low expressivity robots.

Exploring the Potential of Wheel-Based Mobile Motion As an Emotional Expression Modality

Integrating intelligent systems, such as robots, into dynamic group settings poses challenges due to the mutual influence of human behaviors and internal states. A robust representation of social interaction dynamics is essential for effective human-robot collaboration. Existing approaches often narrow their focus to facial expressions or speech, overlooking the broader context. We propose employing an adapted Temporal Graph Networks to comprehensively represent social interaction dynamics while enabling its practical implementation. Our method incorporates temporal multi-modal behavioral data including gaze interaction, voice activity and environmental context. This representation of social interaction dynamics is trained as a link prediction problem using annotated gaze interaction data. The F1-score outperformed the baseline model by 37.0%. This improvement is consistent for a secondary task of next speaker prediction which achieves an improvement of 29.0%. Our contributions are two-fold, including a model to representing social interaction dynamics which can be used for many downstream human-robot interaction tasks like human state inference and next speaker prediction. More importantly, this is achieved using a more concise yet efficient message-passing method, significantly reducing the message size from 768 to 14 while outperforming the baseline model.

Modeling Social Interaction Dynamics Using Temporal Graph Networks

A crucial part of traditional reinforcement learning (RL) is the initial exploration phase, in which trying available actions randomly is a critical element. As random behavior might be detrimental to a social interaction, this work proposes a novel paradigm for learning social robot behavior - the use of shielding to ensure socially appropriate behavior during exploration and learning. We explore how a data-driven approach for shielding could be used to generate listening behavior. In a video-based user study (N=110), we compare shielded exploration to two other exploration methods. We show that the shielded exploration is perceived as more comforting and appropriate than a straightforward random approach. Based on our findings, we discuss the potential for future work using shielded and socially guided approaches for learning idiosyncratic social robot behaviors through RL.

Shielding for Socially Appropriate Robot Listening Behaviors

This paper presents a system for diversity-aware autonomous conversation leveraging the capabilities of large language models (LLMs). The system adapts to diverse populations and individuals, considering factors like background, personality, age, gender, and culture. The conversation flow is guided by the structure of the system's pre-established knowledge base, while LLMs are tasked with various functions, including generating diversity-aware sentences. Achieving diversity-awareness involves providing carefully crafted prompts to the models, incorporating comprehensive information about users, conversation history, contextual details, and specific guidelines. To assess the system's performance, we conducted both controlled and real-world experiments, measuring a wide range of performance indicators.

Enhancing LLM-Based Human-Robot Interaction with Nuances for Diversity Awareness

This paper presents a comprehensive framework to enhance Human-Robot Collaboration (HRC) in real-world scenarios. It introduces a formalism to model articulated tasks, requiring cooperation between two agents, through a smaller set of primitives. Our implementation leverages Hierarchical Task Networks (HTN) planning and a modular multisensory perception pipeline, which includes vision, human activity recognition, and tactile sensing. To showcase the system's scalability, we present an experimental scenario where two humans alternate in collaborating with a Baxter robot to assemble four pieces of furniture with variable components. This integration highlights promising advancements in HRC, suggesting a scalable approach for complex, cooperative tasks across diverse applications.

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Connecting the Dots: Advancing the Understanding of Group-Robot Interactions in Public Spaces Through Ego Network Analysis

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